25860449 has 4 divisors (see below), whose sum is σ = 26348436. Its totient is φ = 25372464.

The previous prime is 25860407. The next prime is 25860493. The reversal of 25860449 is 94406852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23348224 + 2512225 = 4832^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 25860449 - 2⁸ = 25860193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25860049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243914 + ... + 244019.

It is an arithmetic number, because the mean of its divisors is an integer number (6587109).

Almost surely, 2^25860449 is an apocalyptic number.

It is an amenable number.

25860449 is a deficient number, since it is larger than the sum of its proper divisors (487987).

25860449 is an equidigital number, since it uses as much as digits as its factorization.

25860449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487986.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 25860449 is about 5085.3170009351. The cubic root of 25860449 is about 295.7186309983.

The spelling of 25860449 in words is "twenty-five million, eight hundred sixty thousand, four hundred forty-nine".